Electric oven



Dec. 10, 1935. E. F. KEMP 2,023,595

ELECTRIC OVEN Filed July 3, 1934 3 Sheets-Sheet 1 Dec. 10, 1935. E, F, KEMP 2,023,595

ELECTRIC OVEN Filed July 3, 1934 5 Sheets-Sheet 2 l. qx/eqdr:

E. F. KEMP ELECTRIC OVEN Dec. 10, 1935.

Filed July 5, 1954 3 Sheets-Sheet 3 Patented Dec. 10, 1935 UNITED STATES PATENT OFFICIE- 1 Claim.

My invention relates to electric ovens and it has for its object to provide an improved oven of the class indicated which will be particularly adapted for use in roasting nuts.

It is also an object of this invention to provide an electric oven of simple, inexpensive and efficient construction.

To these ends I have provided an improved electric oven having the peculiar features of construction and mode of operation set forth in the following description, the novel features of the invention being particularly pointed out and defined in the claim at the close thereof.

In the accompanying drawings:

Figure l is a top plan view of my improved electric oven.

Figure 2 is a side elevation of the machine shown in Fig. 1.

Figure 3 is a section on line 33 of Fig. 1.

The embodiment of my invention herein illustrated comprises a base frame I made at opposite sides thereof with upstanding arms These arms are formed near their upper ends with alined apertures within which are fixed the opposite ends of a pivot bar |2. On bar I2 is pivotally mounted a supplemental frame that is indicated generally at I3, said supplemental frame being constructed with a shelf |4 provided upon its top side with an upstanding post 5 and upon its under side with a depending arm |6 formed at its lower end with an aperture |6a to receive the inner end of a bolt l'l.

When the bolt I! is removed the supplemental frame |3 can be tilted back and forth on pivot bar I2, movement of said frame in one direction being limited by the engagement of arm IS with a stop lug I8 and in the opposite direction by engagement of arm IS with a stop lug 9. The stop lugs l8 and I9 are formed on one of the arms ll of base l0 and this arm II is formed with three holes 20 for the reception of the bolt I'l, said holes being equi-distant from the axis of pivot bar l2 and disposed so that the aperture |6a of the arm |6 can be positioned in register with either hole.

At its upper end the post l5 of supplemental frame I3 is made with a bearing |5a within which is journaled a hollow shaft 2| which is supported in a horizontal position when the aperture of arm I6 is in register with the intermediate hole 20 of the apertured arm I I, as shown.

Fixed in position upon the rear end portion of the hollow shaft 2| is a worm gear 22 that is driven by a worm 23 fast on the armature shaft 24 of an electric motor 25 secured to and supported by the shelf portion M of the supplemental frame.

Also fixed in position upon the rear end portion of the hollow shaft 2| is a collar 26 of insulating material carrying two metal contact rings 21 and 28 which are continuously engaged, respectively, by spring pressed plungers 29 and 30. Each spring pressed plunger 29 and 30 is slidably mounted within a metal sleeve 3| and the two sleeves are fixed in position within sockets provided within a block of insulating material 32 which, in turn, is fixed in position upon the shelf portion of supplemental frame I3.

The metal sleeve of plunger 29 has fastened to it one of the conductors 33 of an electric circuit while the other conductor 34 of said circuit is connected with the metal sleeve 3| of plunger 30.

The front end of the hollow shaft 2| is made with a socket within which is fixed one end of a tubular porcelain member forming part of an electric heating element 35. One end or terminal of the filament 36 of this heating element is connected by a conductor 3'! with the contact ring 21 while the opposite end or terminal of said filament is connected by a conductor 38 with the contact ring 28.

It will be clear that when the circuit which 5 includes the conductors 33 and 34 is closed said circuit is completed through the heating element 35. The circuit referred to may, and preferably does, include the conductors 39 and 40 of motor so that the operations of the heating element 0 and of the motor are started simultaneously. In practice an ordinary make and break switch may be included in the circuit of motor 25 and heater 35.

The hollow shaft 2| is made adjacent to its forward end with a radial flange 4| between which and a spider or annulus 42 is disposed the inner end wall or head 43 of a cylindrical container 44. The flange 4| and annulus 42 are rigidly secured to the head or end wall 43 by rivets, or otherwise. The end wall 43 is made with a central aperture that is occupied by the hollow shaft 2| so that the axis of the container 44 is alined with the axis of the shaft.

At its forward end the container 44 is provided 45 with a door 48 hingedly connected at 49 to one side of the container and provided with a spring latch 58 engaging an abutment 5| to hold said door in its closed position.

The frame of door 48 is a flanged sheet metal 50 annulus 52 to which is secured a pane of transparent glass 53 through which the interior of the container and its contents can be seen.

When the container 44 is to be loaded with the nuts that are to be roasted or cooked the bolt I! 55 is withdrawn and the supplemental frame I3 is tilted backwards in the direction indicated by the arrow b in Fig. 3 until its arm I6 rests against the stop lug 48 where it may be locked by means of the bolt, if desired, the axis of container 44 then occupying the position indicated by the dotand-dash line 1:.

The nuts are then deposited within the container and its door 48 closed, after which the supplemental frame I3 is returned to its intermediate position shown in Fig. 3 and locked by the bolt H. The circuit through the motor and heating element is then closed whereupon the container 44 is rotated while the contents thereof is cooked by the element 35.

At the completion of the cooking operation the circuit of the heater and motor is opened, door 48 is opened, and supplemental frame [3 is tilted forwardly as indicated by arrow a until its arm l6 rests against stop lug IS with the axis of the container in the position of the dotand-dash line y, whereupon the contents of the container is discharged from the latter by gravity.

Upon the: interior of the cylindrical portion of the container 44 are secured, as by soldering, a plurality of longitudinally disposed ribs or vanes over which the body of nuts N slides as the container rotates thus gently agitating said nuts and turning the same over as the roasting or cooking operation progresses.

What I claim is:

An electric oven including, in combination, a cylindrical container having a fixed end wall at one end thereof and a removable closure wall at the opposite end thereof; a single tubular shaft having one end only thereof rigidly connected to said fixed end wall and communicating with the interior of said container; a single base frame element to seat upon a support; a supplemental frame pivotally connected with said base frame so as to swing on a horizontal axis at right angles to the axis of said shaft, said supplemental frame being constructed with a bearing in which said shaft is journaled; means positively and adjustab-ly connecting said supplemental frame with said base frame element so that said supplemental frame can be angularly adjusted in position to support said shaft and container either in a horizontal position, or a forwardly inclined position, or a rearwardly inclined position; an electric motor mounted on said supplemental frame; power transmitting means through which said motor drives said shaft; a straight elongate electric heating unit within said container and fixedly 2 connected at its one end with said shaft in axial alignment therewith so that it is centrally disposed within said container; a pair of contact rings concentrically mounted upon and insulated from said shaft; .a pair of complementary circuit 25 terminal contacts each sl-idably engaging one of said contact rings, said complementary contacts being mounted upon and insulated from said supplemental frame, and two circuit conductors within said tubular shaft each connected at its 30 one end to one of said rings and at its opposite end to one of the terminals of said heating unit.

EDWARD F; KEMP. 

